EN 61010-1 Overvoltage Category refers to the safety standard for electrical equipment in laboratory, industrial, and other related environments, with a specific focus on Measurement, Control, and Laboratory Equipment. The "CAT" (Category) rating indicates the level of protection against electrical transients (surges) in different environments.
Key Points About EN/IEC 61010-1:
Standard Scope:
Applies to electrical test and measurement equipment, laboratory instruments, and industrial control systems.
Ensures protection against electric shock, mechanical hazards, fire, and other risks.
CAT Ratings (Overvoltage Categories):
CAT I: Protected electronic circuits (e.g., low-voltage circuits inside devices).
CAT II: Household/office appliances (e.g., portable multimeters).
CAT III: Distribution-level wiring (e.g., fixed installations, circuit breakers).
CAT IV: Primary supply lines (e.g., utility connections, outdoor equipment).
Defines the environment where the equipment can safely operate concerning transient overvoltages.
Difference Between EN 61010-1 and IEC 61010-1:
EN 61010-1 is the European (CENELEC) adoption of IEC 61010-1, with possible minor regional modifications.
Compliance with EN 61010-1 is required for CE marking in the EU.
Why is CAT Rating Important?
Ensures the device can withstand voltage surges in its intended environment.
Higher CAT ratings (III/IV) are critical for industrial and utility applications.
Examples of Equipment Covered:
Multimeters, oscilloscopes, power supplies.
Lab analyzers, data loggers, control systems.

Related Articles about Acrel
Popular Acrel Energy Meter Products Recommended